Headlight bulb mounting



March 8, 1938. H. C. DOANE E-r AL 2,110,130

HEADLIGHT BULB MOUNTING V Filed Oct. 50, 1953 Patented Mar. 8,Y 1938 UNITED STATES PATENT' OFFICE 2.11am nnapisonr BULB uoUN'rnvG Appiicun october so, 193s, semi No. 695,776

'20Claimn This invention has to do with a mounting for ,incandescent lamps equipped with locating rings or other devices to permit greater accuracy in location of the illament in headlamps or other 5 apparatus. The object oi.' the invention is the provision oi a mountingfor lamps of this type which will permit insertion of the lamp in the same simple way as in the conventional bayonet slot mounting, that is, simply by inserting the 10 lamp in the opening in the reflector or other support, engaging it with securing means, preferably in the form of pins carried by the support, and then securing the' lamp in position by giving it a partial rotation.

In 'the drawing:

Figure 1 is a vertical section showing an lncandescent lamp with a locating ring mounted by means ci our preferred form oi' mounting.

Figure 2 is a rear view of the reilector which 20 Supports the bulb.

Figure 43 is a perspective view of the assembly used to hold the bulb in the reflector and to supply it with current.

Figure d is a perspective view showing the bulb 25 with its locating ring.

Figure 5 is a fragmentary view showing a modiilcation of the washers shown in Figure 3.

Figure 6 is a fragmentary longitudinal section through a somewhat modified form of assembly.

Figure 7 is a fragmentary view showing the parts oi' Figure 6 disassembled.

In the drawing, l indicates the base of an incandescent lamp which may be provided with one or more laments as is common in headlight- 35 ing practice. The base "I0 is provided with a locating ring i2 having bayonet slots i4 formed therein. The bulb is adapted to be mounted in a reilector i having a depressed portion I8 apertured atti to permit vg'saiisage of the base of the bulb. The locating ring i2 is adapted to seat in the botten; or the part I8, as shown. Slots t8 extend voutwardly from the aperture il tol receive the bulb' securing means; as hereinafter described.

is secured to the base I0 in accurate relation to the @lament This avoids` errors which coinmonlyoccur :ini conventional lamps by reason of improper location oi the illainents in the coul-se ci manufacture. With the filaments accurately located with respect to the ring i2,l and the ring t2 accurately located in the reilector by seating inthe depressed portion I 6, it is apparent that the filaments are positioned in the reector with 'extraordinary accuracy. Y

It will be understood that the locating ring i2 (ci. 24o-41) Our invention consists in securing the lamp in the reflector or other support in so simple a manner that the car user need but insert the bulb in position and give it a partial turn to secure it in place. The preferred construction consists oi' a vholder 20 in the form of a cup-shaped stamping having an out-turned annular ilange 2i within which ls mounted an insulating disc 22 carrying a contact or contacts 2l and yieldingly pressed outwardly by means of a spring 28 which may encircle the conductor or conductors leading to the contacts. The disc 22 is provided with a projecting portion 23 engaged in a slot 28 in the cup, to prevent rotation. as well as to prevent the disc from accidentally slipping out 'of the cup when the bulb is not in place. J

The means for mounting the contact holder on the support consists oi' a number of circumferentially spaced pins 38 having enlarged conical heads 32` provided with pilot extensions 33, `the heads 32 being seated in the slots I8 in the reilector. The pins pass through apertures in the iiange 2l of the member 20 and are secured thereto by heading over their ends at 3l. Springs 38 surrounding the Shanks oi the pins, urge the cup away from the reilector. For convenience in assembly we have shown the lowermost-pins 30 connected adjacent their conical heads 32 with a washer St, while a single washer 3l' is secured to the other pin ln like manner. I'he washer 34 facilitates assembly by holding two oi.' the pins in proper position for engagement with the slots i8. f

The washer 36 preferably is provided with a ange 35 to engage the outer annular wall of the depressed portion it of the reilector.

Figures 2 and 3 taken together show the parts before assembly with the reflector. It will be apparent that this assembly is accomplished by seating the conical heads inthe outer ends oi' the slots i8, and to do this it is necessaryto tilt the pins slightly inwardly toward they reilector axis, to engage the conical heads with the inner ends oi the slots. They thereafter seat in the outer ends of the slots i8, and, oi course, when the lamp is inserted, it prevents their escape from the slots. With this wembly made, to mount the lamp in the headlamp it is necessary only to insert the lamp with the enlarged portions of :slotsv i4 over the pins ,{whereupon the lamp may be rotated to seatl the heads I2 in the smaller ends of the slots.` A

Pilots 33 make it easier to efi'ect engagement between the slots H and the pins, and prevent the lamp from being inserted in a cocked position.

In Figure we have shown a slight modiiication in that in place of washers 3l, 34', we have shown a single annular washer 40. With this arrangement it is necessary to provide a slot 4i to receive one oi the pins, so that the pins still may be bent inwardly in assembling the parts to the reiiector.

In Figures 6 and l'I we have shown a further modiiication, in which the pins 30 are detachably connected with the flange 2| on the cup-shaped holder 2l. This makes it possible, if desired, to

dispense with the washers 3l, 34', and 40. With this construction it is necessary to provide keyhole slots 50 in the bottom of the depression I6 in the reflector, and corresponding key-hole slots Elin the flange 2l. 'Ihis iiange is likewise providedwith opposed depressions 54' extending at an angle to the the pins 3d. v

With this construction the holder 20 is assembled with the reflector by passing the pins 3@ through the slots 50 in the reilector, slipping the -springs 36 .over them, and then inserting the pins through the slots 52 in the flange 2i of the holder 26, and rotating the pins until their heads seat in the depressions 5. Obviously, if desired, the washers 3 4, 34', or 4G, may be used with this construction.

While we have shownand described certain forms -which our invention may assume, it will be understood that this disclosure is illustrative only, and that our invention is not limited thereto.;

We claim:

1. The -combination of a reilector having a central aperture and a plurality of smaller apertures arranged around the central aperture,`a lamp having a base adapted to be inserted in the central aperture, locating means secured to the base adapted to seat in the reiiector adjacent the central aperture and provided with circumferentially extending 'slots having large ends and small ends adapted to be successively brought into registration 'with the smaller apertures in the re- :iiector upon rotation of the lamp about its axis, contact carrying means provided with apertures adapted to be alined with the smaller apertures in the reector and the slots in the locating means and provided with a contact adapted to engage aV contact on the base of the lamp, pins extending through said sets of alined apertures and connecting the lamp and reflector and contact carrying means, resilient means cooperating with the contact carrying means and reilector to apply tension to said'pins to cause the latter to hold the locating means in engagement. with the reflector, the ends of the pins which engage the slots being provided with heads tapering from the diameter of the shank to a diameter in excess ofl the diameter of the small ends of the Y slots inthe locating means but less than the dil by the slots! in` the locating means of the lamp,

whereupon the lamp may be rotated to cause the 'pins vto seat in the smallends of the slotsvand hold the parts assembled.

2. The combination of a reilectorhavinga central aperture and a plurality o i! smaller apertures arranged around the central aperture, a lam'p having va base adapted tobe inserted in the cen- 'mi sperme, locating nieam'sewrd to the base slot 52 to receive the heads of adapted to seat in the reilector adjacent the central aperture and provided with apertures adapted to register with the smaller apertures in the reflector, contact carrying means provided with apertures adapted to be alined with the smaller apertures in the reflector and locating means, connecting means extending through said sets of alined apertures connecting the lamp and reiiector and contact carrying means, resilient means between the contact carrying means and vreiiector adapted to apply tension to said connecting means to cause the latter to hold the locating means in engagement with the reector, and a contact associated with the contact carrying means adapted to engage a contact on the lamp base.

3. -The combination of a reflector having a central aperture and a plurality of smaller apertures arranged around the central aperture, a lamp having a base adapted to be inserted in the centralaperture, locating means secured to the base adapted to seat in the reector adjacent the central aperture and provided with apertures adapted to register with the smaller apertures in the reector, a contact carrier provided with apertures adapted to be alined with the smaller apertures in the reflector and locating means, pins extending through said sets of alined apertures and connecting the lamp and reiiector and contact carrier, springs surrounding said pins between the reflector and contact carrier holding the locating means in engagement with the reector, and a yieldingly mounted contact associated with the carrier adapted to engage the contact on the lamp.

4. The combination of a reector having a depressed portion at its` apex provided with a central aperture and with a plurality of smaller apertures arranged around the central aperture, a lamp having a base adapted to be inserted in the central aperture, a locating ring secured to the base adapted to be seated in said depressed mportion of. the reilector and provided with circumferentially extending slots having large ends and small ends adapted to be successively' brought into registration with the smaller apertures in the reiiector upon rotation of the lamp about its axis, a lcontact carrier having an annular iiange provided with apertures adapted to be alined with the smaller apertures in the reilector and the slots in the ring, pins extending' through said sets of alined apertures, and connecting the lamp and reflector and contact vcarrier, the ends of the pins which engage the slots having heads of less diameter than the large ends or the slots but of greater diameter than the small ends of the slots, resilient means between the contact carrier and reector adapted to apply tension to said pins to cause them to clamp the locating ring in the depression in the reflector, and a contact yieldingly mounted within the contact carrier adapted to yieldingly engage the contact on the'lamp.

5.. The combination of a reflector having a depressed portion at its apex provided with a central apertureand with a plurality of smaller apertures arranged .around the central aperture, a lamp having a base adapted to be inserted in the central aperture, a locating ring secured tothe base adapted to be seated in said depressed portion-of the reector and provided with circumferentiallyA extending slots having large ends and` small ends adapted to be successively brought into registration withthe smaller apertures in the reflector upon rotation. ofthe lamp about .its axis,

ector adapted to apply tension to said pins to cause them to clamp the locating ring in the depressionv in the reflector, a contact yieldingly mounted within the'contact carrier adapted to yieldingly engage the contact on the lamp, and annular means connecting the freeends oi a plurality o! said pins for holding them in properly spaced relation to engage a plurality of said sets `ofapertures.

6. The combination of a'reector having a depressed portion at its apex provided with a central aperture and with a plurality of notches extending from the central aperture, a lamp having a base adapted to be inserted in the central aperture, a locating ring. secured to the base adapted to be seated in said depressed portion of the reilector and provided Awith circumferentially ex,- tending slots having large ends and small ends adapted to be successively brought into registration with the notches in the reflector upon rotation of the lamp about its axis, a cup-shaped con# tact carrier having an annular flange provided i with apertures adapted to be alined with the notches inthe reector and the slots in the ring, headed pins extending through said sets of aimed openings and connecting the lamp and reflector and contact carrier, the heads being of less diameter than the large ends of the slots but of great- -er diameter than the small ends of the slots, re-

silient means between the contact carrier and retures arranged around the central aperture and communicating therewith, a 'lamp having a base adapted to be inserted in the central aperture, a

-locating ring secured to the base adapted to be seated in said depressed portion of the reector and provided With circumferentially extending slots having large ends and small ends adapted to be successivelybrought intoregistration with the smaller apertures in the reector upon rotation of the lamp about its axis, a cup-shaped contact carrier having an annular ange provided with apertures adapted to be alined with the smaller apertures in the reector and the Slots in the ring,pinsextending through said sets ofA alined apertures, said pins being headed at opposite ends so as to connect the lamp and reector and contact carrier, the heads of the pins which engage the slots being of less diameter than the large ends ofthe slots but of greater diameter than the smallends of the slots, coil springs surrounding the pins between the reector and contact carrier andgserving to yieldingli clamp the lamp locating ring in the depression in the reilector, and a contact yieldingly mounted within "the contact carrier adapted to engage a contact on the lamp. 8. The combination of a reector having a del'tion of the lamp aboutrits axis, a cup-shaped contact carrier having an annular flange provided with apertures adapted to be alined with the smaller apertures in the reector and the slots in the ring, pins extending through said sets of alined apertures, said pins being headed atopposit ends Vso as to connect the lamp and reiiector and contact carrier, the heads of the pins which engage the slots being of less diameter than the large ends of the slots but of greater diameter than the small ends of the slots, coil springs surrounding the pins between the reflector and contact carrier and serving to yieldingly clamp the lamp locating ring in the depression in the reiiector, a contact yieldingly mounted with- 'in the contact carrier adapted to engage a contact onv the lamp, and means associated with a plurality of said pins for holding them in properly spaced relation to engage a plurality of said.

members, and headedpins connecting said memt bers andlimiting the relative movement thereof under"th e tension of said spring, the forward ends of said pins being adapted to pass through x registering apertures in said reiiector intooperative engagement with the slots in said iiange.

10. In a lamp assembly, the combination of a concave reector, a lamp having a securing iiange engageable with said reflector, a contact carrier engaging the reary of said reiiector, said carrier comprising' two relatively movable members, a

spring between said members, and headed pins connecting said members and limiting the rela-Y tive movement thereof under tension of said spring, the forward ends of said pins being adapted to pass through said reiiector intooperative engagement with said ange, thereby holding said carrier and said lamp in firm engagement with said reflector.

11. In. a xed focus lamp assembly, the combination with a concave reilector provided with a central recess, and a lamp having a positioning flange engaging said recess and provided with ,a plurality of segmental slots in said iiange, of pressing means, detachably engaging said reflect'or in rear thereoi',for pressing said ange into said recess, said pressing means comprising two relatively movable members, a spring beiween said members, and headed pins connecting s iid members and limiting the relative movement Ythereof under the tension of said spring, the forilange. i

12. In a lamp assembly, the combination of a concave reflector, a lamp having a securing iiange engageable with said reflector, pressing means, engaging the rear of said reiiector, said pressing means' comm'ising two relatively movable members, a spring between said members, and headed pins connecting said members and limiting the relative movement thereof under tension of said spring, the forward ends of said pins being adapted to pass through said reector into operative engagement with said flange, thereby holding said means and said lamp in iirm engagement with said reflector. n

13. A unitary device for connecting an incandescent electric lamp to a mounting, comprising: a carrying member; a plurality of projections swingably carried by said carrying member, normally extending in a direction transverse to the general plane of said carrying member; said projections havinglateral extensions at their free ends; and resilient means for biasing said projections into a position in which they have said normal direction, and i'or biasing said lateral extensions away trom said carrying member.

14. In combination: a reiiector having a centralaperture anda plurality o! smaller apertures varranged around said central aperture; a lamp bulb having a base adapted to be inserted in said central aperture locating means provided on said base, adapted to seat in said reiiectoi:` adjacentl said central aperture; said locating means being provided with circumferentially extending com-` pound apertures having large portions and small portions spaced circumferentia'lly; said compound apertures being so disposed that their 'circum-Y 4a, contact n said bulhltid parts being Provided with enlarged'heads normally protruding beyond the yadjacent surface of said reector and adapt- -ed to through said large portions but not through said small portions, said enlarged heads including means whereby, when said large portions'are passed over said' enlarged heads and said bulbis rotated, said heads will become seated in said small portions.

15 In combinationra reector having a central aperture and a plurality of smaller apertures Aarranged around said central aperture; a lamp bulb having a base adapted to be inserted in said central'aperture; locating means provided on said base, -adapted to seat in said reflector adjacent` said. central aperture; said locating means being provided with apertures adapted to register with said smaller apertures; and means cooperable with .said bulb to connect the same to said reflector and to make electrical contact with said bulb, said means including parts extending through said registering apertures, means for applying tension to said parts to cause said parts to hold said locating means in engagement with said reiiector, and a'contact adapted to engage Ea contact on said bulb. f

` 16.` In combination: a reiiector aidepressed portion at its apex provided with 'a cenaperture and with a plurality of smaller aperture arranged around said central aperture; alampbulbhaving ab'aseadapted tobeinserted `on said base, adapted to be seated in said depressed portion of said reiiector; said ring being provided with circumferentially extending compound apertures having large portions and small portions spaced circumferentially; said compound apertures being so disposed that their circumferential locus is adapted to intersect said smaller apertures; and means cooperable with said bulb to connect the same to said reiiector and to make electrical 'contact with said bulb, said means including an annular flange having associated therewith parts extending through said smaller apertures and said compound apertures, means for applying Vtension to said parts to cause said parts to clamp said locating ring in said depression in saidI reflector, ,and a `contact adapted to engage a contact on said bulb.

17. A unitary device ior connecting an incandescent electric lamp to a mounting, comprising: a carrying member; a plurality of projections carried by said carrying member and extending transversely to the general plane of said carrying member; said projections each having a lateral extension at its free end; a washer member on `said projections between said lateral extensions and said carrying member; and resilient means biasing-said washer member toward said lateral extensions. f

18. A unitary device for connecting an incandescent electric lamp to a mounting, comprising: a plurality oi pimns each having a shank and a head, a carrying member having a plurality of apertures through which said Shanks are respectively disposed so that said pins extend in a direction transverse to the general plane of said carrying member; a washer member on said Shanks between said carrying member and said heads; resilient means acting on said washer member for biasing said heads away from said carrying member; and means for hunting movement of said heads away from said carrying member.

19. In combination: an incandescent electric lamp having a base, and having an apertured lateral extension on .said base; an apertured mounting for said lamppand a permanently integral unitary device, constructed and arranged to detachably connect said lamp to said mounting; said device including a plurality-of pins constructed and arranged to extend' through said apertured mounting and through said apertured lateral extension onl said base, each pin having a shank and each also having a head constructed and arranged to engage said lateral extension on said lamp base; said unitary device including also a Vcarrying member for said pins having a plurality of apertures through which said Shanks are respectively disposed so that said pins extend transversely to the general plane of said mountins, said unitary device including also resilient means constructed and arranged to press .said heads against said lateral extension on said lamxrbase to press said lateral extension against said mounting; and said unitary device and said mounting being relatively so, constructed and ar" ranged that said device may be applied to andseparated from said mounting as a unit, without riisassemblyotv said univ device. Y

20. In combination: incandescent electric lamp a base; an apertured mounting '-for said lamp; i'cr connecting said lamp to said mounting, including. an apertured lateral extension on said a carrying member, a plurality oi' projections unitarily carried by said carrying member and so carried that said proje'cin said central slocating ring provided vtions extend transversely to the general plane of said mounting through said aperturd mounting i and'through said apertured'iateral extension on said lamp base, said projections each having a lateral extension at its free end .constructed and arranged to engage said extension on said lamp base, a washer member on.said projections between said carrying member and said lateraiextensions on saidprojections, and resilient means, acting on said washer member and said carrying HARRY C. DOANE. FRANK H. PRESCOTI. CLARENCE A. MICHEL.v 

